Anson p



(No Model.)

Patented Apr. 7, 1885.-

1% 7: INVENTOR:

L I; WITNEEEE E= UNITED STATES PATENT OFFICE.

ANSON P. THAYER, OF BROOKLYN, NE\V YORK, ASSIGNOR TO THOMA S W. HALL, OF SAME PLACE.

DIE FOR MAKING METALLIC FENCE-BARBS.

SPECIFICATION forming part of Letters Patent No. 315,087, dated April 7, 1885.

7 Application filed March 2,1885. (No model.)

10 separating a double-blank strip and forming barbs on two rods produced from the strip, said strip consisting of two parallel ribs or cores connected by a thin web of metal, along which the strip is to be separated, and out of which the barbs are to be formed.

The method of separating the rods and forming the barbs consists of first slitting said web along a zigzag line,so as to form projections on each rod containing the material for two or more barbs, and the waste to be cutaway from between the barbs, alternating with corresponding notches; and, second, cutting away said waste material of said projections so as to form a barb at each end thereof, and, if de- 2 5 sired, an intermediate barb; but the method forms the subject-matter of a separate application for a patent.

The dies consist of two pairs of ribbed and grooved shearing-dies, the first pair being adapted to shear the blank apart along a zigzag line, and form alternate notches and projections of equal length on both rods, thelength of the projectionsfbeing such as to form two barbs fromfeach projection of the required dis- 3 5 tance apart along the rod by cutting away the intermediate waste material, and the second pair of dies have ribs and grooves adapted to cutjaway fromlsaid projections this waste material from between the barbs of the respective 40 rods, which are fed singly through the second dies.

In the accompanying drawings, Figure l is a transverse section of a blank strip to be sheared apart and barbed. Fig. 2 is a plan 5 view of a portion of the double-blank strip,

showing by theifull linejthe course along which it is to be sheared apart by the first pair of dies, and indicating by the dotted line the waste pieces that are to be cut out of thepro- 5o jections by thej second dies to complete the and grooved on the sides also.

barbs. Fig. 3 is a horizontal section of the movable die and plan view of the bed-die of the first pair employed to shear the blank-strip apart, with a piece of the double-blank strip between them, showing the method of shearing it apart. Fig. 4: is ahorizontal section of the movable die and plan view of the bed-die of the second pair employed for cutting out the waste pieces from the projections of the separated rods, with a portion of one of the rods on the bed-die, as when being cut. Fig. 5 is aside elevation of the dies and rod represented in Fig. 4:. Figs. 6 and 7 are modificae tions of Figs. 3 and 4, respectively. Fig. 8 is a horizontal section of the movable die and plan view of the bed-die of the second pair as they may be modified when it may be preferred to cut away the waste portions of the projections,so as to make three barbs ontof one projection,with a portion of one of the rods on the bed-die, as when being out.

First, I provide a pair of shearing-dies, ab, having alternate ribs 0 and grooves d on one side, of like form and dimensions, and fitting together suitably to shear the blank strip apart through the middle web along the zigzag line f,by which to form projections g on each rod, with corresponding notches between the projections, the length of said projections being sufficient for containing the material for two barbs, that will be the requisite distance apart along the rod when completed by cutting away the waste material on of the projections between them, and said notches and projections being of equal dimensions. I also provide another pair of dies, h i, for cutting out the waste portions of projections g, as indicated by the dotted lines, Fig. 2, and represented in Fig. 4 by the full lines of the die-ribs j, to complete the barbs Z. These dies are ribbed The ribs j on the die h and the corresponding grooves Jo in the die t are made in suitable width,

and are located the requisite distance apart to cut out the waste pieces m from the projections g of a single rod. In this case I have represented three die-ribs j and corresponding grooves k in one pair of dies h "i, but four is the requisite number for enabling one pair of these dies to finish the two rods sheared apart by the dies a b as fast as they are delivered from said dies, which have two die ribs and grooves to each single rod, and it will be seen that the ribs j are 5 cated suifioiently distant from each other to cut into the projections g,suitably for forming a barb at each end of said projections, so that the spaces 19 between the ribs j are as wide as one projection g and two barbs. It will also IO be seen that the spaces between the barbs formed by these dies vary in length, one space being as long as the projections and the next only the length between two barbs formed in aprojection, g. Vhen more barbs are formed out of each projection, the spaces between the barbs made of one projection will be still shorter. As the dies of Fig. 3 are arranged, the blank strip will be fed from end to end of said dies at each operation of the dies, and 20 likewise the single rods will be fed the length across the dies of Fig. 4 at each movement; but if preferred to use both pairs of dies in greater breadth and number of ribs, it may be done with correspondingly-increased feed movements, and dies at b may be diminished in length one-half, as represented in Fig. 6, and used with shorter feed movements of the strip, while the dies h 'i may be diminished by two-thirds of their lengththat is to say, one

rib j v'and its groove 75 may be used alone, as represented in Fig. 7. The two pairs of dies will preferably'be used on separate machines. For cutting the waste from the projections 9, so as to make three barbs out of each projection, two ribs j and grooves It will be arranged to out two notches in each projection, and but for the narrow and thin-edged rib of die 1', that would separate the two grooves 70, they might be located close together for cut 40 ting both notches in one projection at once; but as such a thin-edged rib would wear away much faster than the rest of the die, and would be liable to crack and break off, Iprefer to arrange these ribs and grooves more distant apart, as represented in Fig. 8, where they are 5 separated the distance of one feed movement, plus the distance they would be if placed close together, as above stated, so that the two notches of the projections are cut successively. WVhen making three barbs from the projections g, I prefer to make said projections longer than when only making two barbs therefrom, as I have represented them in Fig. 8. The blank strip to be cut consists of the two ribs or cores (1, middle web, 8, and the outer flanges, t. The dies will be suitably grooved in the faces, in conformity with the shape of the ribs or cores q. IVhat I claim, and desire to secure by Letters Patent, is r,

The combination of dies a b, having one or more ribs, 0, and grooves (Z, adapted to shear apart and form from one strip two rods having alternate projections g and corresponding notches of equal length, and dies hi, having one or more ribs, j,and corresponding grooves 6 k fitting said ribs, the width of the ribs and grooves of dies a Z) being such that the proj ections g formed thereby include two or more barbs of one and the same rod and the waste between them, and the width of the ribs and grooves of dies h 2 being adapted to cut the waste from said projections and form two or more barbs therefrom, substantially as described.

In witness whereof I have hereunto signed 7 5 my name in the presence of two subscribing witnesses.

ANSON P. THAYER. \Vitnesses:

V. J. IVIORGAN, F. A. THAYER. 

